Energy dependence of particle multiplicities in central Au+Au collisions

B B Back; M D Baker; D S Barton; R R Betts; R Bindel; A Budzanowski; W Busza; A Carroll; J Corbo; M P Decowski; E Garcia; N George; K Gulbrandsen; S Gushue; C Halliwell; J Hamblen; C Henderson; D Hicks; D Hofman; R S Hollis; R Hołyński; B Holzman; A Iordanova; E Johnson; J Kane; J Katzy; N Khan; W Kucewicz; P Kulinich; C M Kuo; W T Lin; S Manly; D McLeod; J Michałowski; A Mignerey; J Mülmenstädt; R Nouicer; A Olszewski; R Pak; I C Park; H Pernegger; M Rafelski; M Rbeiz; C Reed; L P Remsberg; M Reuter; C Roland; G Roland; L Rosenberg; J Sagerer; P Sarin; P Sawicki; W Skulski; S G Steadman; P Steinberg; G S F Stephans; M Stodulski; A Sukhanov; J-L Tang; R Teng; A Trzupek; C Vale; G J van Nieuwenhuizen; R Verdier; B Wadsworth; F L H Wolfs; B Wosiek; K Woźniak; A H Wuosmaa; B Wysłouch; PHOBOS Collaboaration

doi:10.1103/PhysRevLett.88.022302

Energy dependence of particle multiplicities in central Au+Au collisions

Phys Rev Lett. 2002 Jan 14;88(2):022302. doi: 10.1103/PhysRevLett.88.022302. Epub 2001 Dec 27.

Authors

B B Back¹, M D Baker, D S Barton, R R Betts, R Bindel, A Budzanowski, W Busza, A Carroll, J Corbo, M P Decowski, E Garcia, N George, K Gulbrandsen, S Gushue, C Halliwell, J Hamblen, C Henderson, D Hicks, D Hofman, R S Hollis, R Hołyński, B Holzman, A Iordanova, E Johnson, J Kane, J Katzy, N Khan, W Kucewicz, P Kulinich, C M Kuo, W T Lin, S Manly, D McLeod, J Michałowski, A Mignerey, J Mülmenstädt, R Nouicer, A Olszewski, R Pak, I C Park, H Pernegger, M Rafelski, M Rbeiz, C Reed, L P Remsberg, M Reuter, C Roland, G Roland, L Rosenberg, J Sagerer, P Sarin, P Sawicki, W Skulski, S G Steadman, P Steinberg, G S F Stephans, M Stodulski, A Sukhanov, J-L Tang, R Teng, A Trzupek, C Vale, G J van Nieuwenhuizen, R Verdier, B Wadsworth, F L H Wolfs, B Wosiek, K Woźniak, A H Wuosmaa, B Wysłouch; PHOBOS Collaboaration

Affiliation

¹ Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA.

PMID: 11801006
DOI: 10.1103/PhysRevLett.88.022302

Abstract

We present the first measurement of the pseudorapidity density of primary charged particles in Au+Au collisions at root square[s(NN)] = 200 GeV. For the 6% most central collisions, we obtain dN(ch)/d(eta)/(/eta/<1) = 650+/-35(syst). Compared to collisions at root square[s(NN)] = 130 GeV, the highest energy studied previously, an increase by a factor of 1.14+/-0.05 at 90% confidence level, is found. The energy dependence of the pseudorapidity density is discussed in comparison with data from proton-induced collisions and theoretical predictions.